344 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY - IV. 



reaching the front of the anal, in the females reaching the. vent; pecto- 

 rals reaching past front of veiitrals in both sexes. Color olivaceous, 

 the scales with dark edgings; a very distinct black band in both sexes 

 running through eye and 'snout straight to the base of the caudal, 

 where it ends in a round black spot ; this band is about as wide as a 

 series of scales, although developed on parts of two series; a conspicu- 

 ous black band in both sexes along the lower edge of the caudal pedun- 

 cle, from the root of the caudal to the vent, dividing and passing on 

 each side of the anal fin; fins in the female plain; in the male, basal 

 half of dorsal and anal jet black, outer half pale with a black edge; 

 pectorals and especially ventrals also dark-edged; caudal iin faintly 

 mottled ; vertical fins with more or less red in life. Head 1; depth 4^. 

 D. 9; A. 9. L. 1J inches. Arlington lliver, Florida, a tributary of the 

 Saint John's. 

 (Jordan, Proc. U. S. Nat. Mus. 1879, 240.) 



161. GAM BU SI A Poey.* 

 (Heterandria Agassiz.) 



(Tory, Mem. Cuba, i, 382, 1831: type Gambusia punctate Poej, from Cuba.) 



Body moderately elongate. Month medium ; both jaws with a baud 

 of conical teeth; snout not produced ; the lower jaw prominent. Eyes 



* PSEUDOXIPHOPHOHUS UU-i-ker. 



(Pwciliodes Steindaclmer. ) 

 (Bleeker, Iclithyol. Lid. Prodr. Cypr. I860, -I-':?: type Xiphophoras bimdciilutiiK Heckel.) 



This ^eiius has flic general characters <>f (;<t>ithi<xi<t, diHeriiijj in Hie lari^T si/.o of 

 the dorsal I'm, which has 14-1G rays instead of G-10. Mexico, (tpevdo?, false; A'ij>Ao- 

 phorun. ) 

 * Anal process ending in a small hook. 



P. bimnculatus (Heckel) Giinther. 



Kaeh M'.-ili- with a brown crescent ; a black sp >( behind upper end of gill-opening, 

 and a roond blackish spot on upper half of root of caudal. Hcad'H; depth i;. i;. c>; 

 D. !: A. Hi; M-al.-s >J!l-8. L. 4 iiK-hrs. Mexico. (Ciiiillur.) 



(Xiphophonu bimaoulatue lleckd, Sit/^sber. Akad. Wiss. \Vien, 1>1-', ICi'.t; Ciinther, 



vi, 



** 



Aii;il pmce.ss without, hook. 



P. rf'ti<-iilnlii.i Tioschol. 



Coloration as in the im-cedinr; ; caudal tin entirely blaekish. Depth li in total 



I). 1C,; A. -. Mexico. (<;iiiilli,-r.) 

 (Tro-chcl, Miiller's li.i^c Mexico, iii, App. l'l; (iiinther, vi, :!:;:;.) 



I'.KI.ONKSOX Kner. 



(Kner. Sitx.^slier. Akad. Wiss. \Vini. l-i'.n, \|, |]'.: type /;, l,,n<-*<>.r l><li;< tint* 



Cleft of I he mouth much de\clu|icd laterally, the jaw hones bein^ much produced. 

 The iuieiinaxillarie.a form together an eldii-ate triangular plate, but are not anchy- 



